Unit Plan
Cuemath

Cuemath: Angle Bisector Theorem

For Students 9th - 10th Standards
This short lesson focuses more on the angle bisector theorem. Learn about the angle bisector theorem proof, triangle angle bisector theorem, how to construct angle bisector, and other interesting properties and facts around angle bisectors.
Activity
Texas Instruments

Texas Instruments: Traditional Compass Construction: Angle Bisector Using Cabri

For Teachers 9th - 10th Standards
Use Cabri Jr. and the Compass command to complete the actual construction - pencil, paper, and compass process.
Activity
Texas Instruments

Texas Instruments: Angle Bisectors and Medians of Quadrilaterals

For Teachers 9th - 10th Standards
In this activity, students will construct angle bisectors and medians in quadrilaterals and explore the properties that appear to be true for four-sided figures. They may find it necessary to review the definitions and properties of...
Activity
Texas Instruments

Texas Instruments: Altitude, Median, and Angle Bisector of a Triangle

For Teachers 9th - 10th
In this activity, you will construct special segments of a triangle named altitudes, medians, and angle bisectors, Using their definitions. You will look at how an altitude, a median, and an angle bisector divide the area of a triangle....
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Angle Bisection and Midpoints of Line Segments

For Teachers 9th - 10th Standards
This task provides a construction of the angle bisector of an angle by reducing it to the bisection of an angle to finding the midpoint of a line segment. Aligns with G-CO.D.12.
Activity
Texas Instruments

Texas Instruments: Simple Constructions

For Teachers 9th - 10th Standards
In this skill activity, students can use the Constructions Tools Menu in Cabri Jr. to contruct a parallelogram. They will also construct an altitude, an angle bisector and a median of a triangle.
Handout
Sonoma State University

Sonoma State University: Angle Bisector

For Students 9th - 10th Standards
This site offers an explanation with words and pictures on how to bisect an angle using a compass and straightedge.
Activity
Texas Instruments

Texas Instruments: Dynamic Geometry: Basic Constructions

For Teachers 6th - 8th Standards
Students use the Cabri Jr. application to draw triangles and construct perpendicular bisectors on the sides of a triangles. They study the properties of a triangle and understand how the measures of angles of a triangle is always 180...
Activity
Other

Advogato: Trigonometry by Geometric Construction

For Students 9th - 10th Standards
This site from Advogato is all about angles. It contains information starting with what an angle is and what it looks like, all the way up to bisecting angles and theorems about angles. This is very good information for students just...
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Graphing Calculator Practice Problems: Point, Line, Planes, Angles

For Students 9th - 10th Standards
Practice using your graphing calculator for drawing and labeling points, lines, planes, and angles. If you get stumped or if you would like to check your work, then select the View Solution button, which is located directly under each...
Activity
BBC

Bbc: Ks3 Bitesize: Constructions and Locus

For Students 9th - 10th
This BBC Bitesize focuses on constructions and locus. To understand this activity, you must already know how to define perpendicular, bisect, and locus.
Activity
Oswego City School District

Regents Exam Prep Center: Bisect a Line Segment and an Angle

For Students 3rd - 8th Standards
This step-by-step tutorial teaches students how to construct a bisector of a segment and the bisector of an angle.
eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 5.2 Bisectors of Line Segments and Angles

For Students 9th - 10th Standards
Learn how to construct bisectors of line segments and angles.
Activity
Texas Instruments

Texas Instruments: Cabri Geometry Tour

For Teachers 9th - 10th Standards
In this activity, students use the Cabri software to mark points, draw lines, construct parallel and perpendicular lines, angles, bisectors, and triangles. They learn how to use the tool to measure angles.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: g.c Inscribing a Circle in a Triangle Ii

For Teachers 9th - 10th Standards
This task focuses on a fact which comes out of the construction of the inscribed circle in a triangle: the angle bisectors of the three angles of triangle ABC all meet in a point. Aligns with G-C.A.3.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G C Locating Warehouse

For Teachers 9th - 10th Standards
You have been asked to place a warehouse so that it is an equal distance from three roads on a map. Students must fold a paper so that this point is where two folds intersect, and they must explain why their construction works and why...
Handout
Math Words

Mathwords: Inscribed Circles

For Students 9th - 10th Standards
Mathwords provides an explanation and a diagram of an inscribed circle. By clicking on any of the highlighted words, you will learn about related terms.